Odyssey MKII High-Pass filter
2011-07-24 by klosmon
While we re on the subject of Odysseys, I have one on the bench with a high-pass filter that has no response for 4/5ths of the slider travel -- then at the top
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[vintagesynthrepair] Re: Arp Odyssey: any note leads to a high pitch
2011-07-24 by Malte Rogacki
... I would probably replace A1 (LM1458) first. I m under the impression that the quality of opamps has improved significantly. Some Odysseys I worked on
Re: [vintagesynthrepair] Arp Odyssey: noise generator
2011-07-24 by Malte Rogacki
... The noise generator resides on board A-II; I ve found that often the first opamp has failed. This is Z5 which can be replaced by a LM301. Since both white
Arp Odyssey: noise generator
2011-07-24 by JP Szarak
hello group, can anyone direct me in how i should go about fixing a non functioning white / pink noise generator on a mk ii odyssey? thank you in advance, jp
Re: Arp Odyssey: any note leads to a high pitch
2011-07-24 by Boddington
Thank you for clearing that up. I suspected that this was the case as well but I never found that clarification. As you pointed out, the documentation suggests
[vintagesynthrepair] Re: Arp Odyssey: any note leads to a high pitch
2011-07-24 by Malte Rogacki
... That s not what it is called and labelled. As we can see it is called VCA Gain and is supposed to do exactly what you describe. So there s no actual
Re: Arp Odyssey: any note leads to a high pitch
2011-07-24 by Boddington
Hi Malte! Sounds like it was perfect timing! I m referring to the upper row: AR gain. This is the one that allows the leakage. Lower row - ADSR gain - does not
[vintagesynthrepair] Re: Arp Odyssey: any note leads to a high pitch
2011-07-24 by Malte Rogacki
Hello, it s been awhile and I was away for two weeks; so let s see if we can get any further now. For now I would suggest working on one problem at a time.
Re: Arp Odyssey: any note leads to a high pitch
2011-07-23 by Boddington
Curious. Even with Board A disconnected, Board B & C still generate a low tone (again with AR s gain up).
Re: Arp Odyssey: any note leads to a high pitch
2011-07-23 by Boddington
... I can confirm that it behaved as you described. I also tested the attack & gain in the AR and can confirm that they work as well. ... To clarify, what I m
JEN STRING MACHINE
2011-07-23 by Alexandro
Hi May anyone help with circuits for JEN SM-2007 ? http://matrixsynth.blogspot.com/2010/01/jen-sm-2007-string-machine-synthesizer.html I wanted to make some
Re: Minimoog Knob Inserts?
2011-07-20 by Quazimodo
It OK - (in case anyone was worried...;c) They ve got back to me now. Cheers, TOM
Re: Minimoog Knob Inserts?
2011-07-11 by Quazimodo
Strange - this place *caesound* isn t responding to my emails or messages. Does anyone know - are they still trading? Cheers, TOM
Re: Minimoog Knob Inserts?
2011-07-09 by Quazimodo
Thanks Doug, it is only the inserts I need! The knobs themselves are fine. And it will be a lot cheaper that way...;c) Cheers, TOM
Re: Synthi AKS Restoral
2011-07-09 by Doug
Thanks Duncan, Robin finally got back to me. He can supply knobs & pots, and even the newer front panel (though it uses a different joystick), but there are
Re: Minimoog Knob Inserts?
2011-07-09 by Doug
Tom, Looks like you found the inserts by themselves, but Small Bear now offers the entire lineup of Moog knob repros. I use alot of them for producing our
Re: Minimoog Knob Inserts?
2011-07-08 by Quazimodo
Thanks Mike - that s what I needed...;c)
RE: [vintagesynthrepair] Minimoog Knob Inserts?
2011-07-08 by Michael Casino
Last search. This should of came up with the set but did not: http://www.synthesizers.com/cabinets.html#parts Mike From: vintagesynthrepair@yahoogroups.com
RE: [vintagesynthrepair] Minimoog Knob Inserts?
2011-07-08 by Michael Casino
Here are the whole Knobs set. http://www.synthesizers.com/qmmkk.html Just the chicken head inserts: http://compare.ebay.com/like/250591723999?var=lv
RE: [vintagesynthrepair] Minimoog Knob Inserts?
2011-07-08 by Michael Casino
Here is one place: http://caesound.net/minimoogpionterknobinlays-1.aspx Mike From: vintagesynthrepair@yahoogroups.com
Minimoog Knob Inserts?
2011-07-08 by Quazimodo
Hi guys, Does anyone know if those shiny circular knob inserts can be bought seperately? The knobs are good on this Mini I am restoring - but a couple are
[vintagesynthrepair] Re: Arp Odyssey: any note leads to a high pitch
2011-07-01 by Malte Rogacki
... This is not uncommon. I don t know offhand if this could be a calibration issue (probably not). However I have observed that the whole CV memory circuit is
Re: Arp Odyssey: any note leads to a high pitch
2011-07-01 by Boddington
Hi Malte, Thank you for the help so far! I figured I should reply back when I had something useful to add. I actually got sidetracked with the original issue
[vintagesynthrepair] Re: Arp Odyssey: any note leads to a high pitch
2011-06-27 by Malte Rogacki
Of course there s also the faint possibility that a key contact has gotten stuck. Which leads to a number of additional questions: You mentioned it is a MKI.
Re: Synthi AKS Restoral
2011-06-27 by duncan
I saw an empty synthi a case go on ebay a few months ago for a ridiculous sum.. you need to get in touch with robin at ems; he s known to be slowly working
[vintagesynthrepair] Re: Arp Odyssey: any note leads to a high pitch
2011-06-26 by Malte Rogacki
I suppose you have the service manual? Check the main keyboard CV out (pin 8 on the connector). I believe this should even work without the backplane. If this
Re: Arp Odyssey: any note leads to a high pitch
2011-06-26 by Boddington
I ve been leaning to board A over and over again too. I ll look again now.
Re: [vintagesynthrepair] Arp Odyssey: any note leads to a high pitch
2011-06-26 by Malte Rogacki
I suspect the error to be on board A1; check the whole vicinity of the CV memory circuit.
Arp Odyssey: any note leads to a high pitch
2011-06-26 by Boddington
I have an MKI here that s been driving me mental for the last little while. Basically any note you hit on the keyboard leads to a sweep at the highest possible
Synthi AKS Restoral
2011-06-25 by Doug
I ve just been given a rare Synthi AKS by a friend to restore. There are numerous electronic problems that I have yet to delve into, so I m certain to have
Re: Crumart Trilogy replacement power transformer
2011-06-24 by Boddington
I do see what you both mean. The load is another factor and doesn t necessarily mean it requires more voltage. I was reasonably surprised, however, that the
Re: [vintagesynthrepair] Re: Yamaha AN1x Battery Replacement Question
2011-06-23 by Samuel Adams
Thanks to all who ve responded! BOTH of these postings are helpful plus the guy I brought the battery from said he s including instructions on how to replace
Re: [vintagesynthrepair] Re: Yamaha AN1x Battery Replacement Question
2011-06-23 by Daniel Forró
And this way you can enter Test Mode: Power Off 0 + NO + YES + Power On Daniel Forro
Re: [vintagesynthrepair] Re: Yamaha AN1x Battery Replacement Question
2011-06-23 by Daniel Forró
I have found this in my archive: Yamaha AN1x reset: 1) Turn OFF the power. 2) Press and hold the (7), (8) and (9) buttons down simultaneously while turning ON
Re: Yamaha AN1x Battery Replacement Question
2011-06-23 by Susie
It isn t a CR2032. From memory, it s the less common CR2450. It is socketed and I can confirm it is possible to change it while the unit is switched on - just
Re: [vintagesynthrepair] Yamaha AN1x Battery Replacement Question
2011-06-23 by Daniel Forró
I suppose there s factory reset function so after changing battery you can easily get original sounds. Of course you can save bulk dump into external sequencer
Yamaha AN1x Battery Replacement Question
2011-06-23 by Samuel Adams
Hi, I need advice on how to change the battery in a Yamaha AN1x synth. I ve looked through the manual but didn t find instructions on how to do this. I have
RE: [vintagesynthrepair] Re: Crumart Trilogy replacement power transformer
2011-06-22 by Brian
Hi You make a statement that this is not necessarily true! It
[vintagesynthrepair] Re: Crumart Trilogy replacement power transformer
2011-06-21 by Malte Rogacki
... How do you know that? ... Which doesn t mean a thing unless you know how much additional power those outputs draw. The load could even be lighter! ...
Re: [vintagesynthrepair] Re: Crumart Trilogy replacement power transformer
2011-06-21 by Gary Miraz
Cheers. You are so welcomed and to the snow fields page host. Hope you get your trilogy back up. Best, Gary Miraz www.mirazmusik.com Los Angeles
Re: [vintagesynthrepair] Re: Crumart Trilogy replacement power transformer
2011-06-21 by Neil Boughey
Gary, Your an absolute gem, just what i needed! Many, man thanks Neil Boughey neilnsheila@btinternet.com 07590 114633
Re: [vintagesynthrepair] Re: Crumart Trilogy replacement power transformer
2011-06-21 by Gary Miraz
Hi Neil, Maybe this will help. http://thesnowfields.com/manuals.html Regards. Miraz www.mirazmusik.com ________________________________ From: Neil Boughey
Re: Crumart Trilogy replacement power transformer
2011-06-21 by Neil Boughey
Has anyone got a .pdf of the service manual for the Trilogy? I m about to get mine looked at cause of a problem with filter triggering in the synth section.
Re: Crumart Trilogy replacement power transformer
2011-06-21 by Boddington
Oh yeah - meant to add - each secondary on the T60 is 20V.
Re: Crumart Trilogy replacement power transformer
2011-06-21 by Boddington
Yes the Trilogy s transformer was blowing the fuse constantly, even without the PSU board attached. Once I tested the Stratus secondaries and confirmed that
[vintagesynthrepair] Re: Crumart Trilogy replacement power transformer
2011-06-21 by Malte Rogacki
... Why must the Trilogy s transformer have produced more voltage? Does the 20V figure apply to both secondaries? How did the transformer of the Trilogy check
Re: Crumart Trilogy replacement power transformer
2011-06-21 by Boddington
Hi again everyone I finally posted some pics of the Crumar Transformer and PSU. I also acquired another PSU from a Stratus in the mean time and snapped pics of
Re: [vintagesynthrepair] Re: Alpha Juno 2
2011-06-19 by Evan Dembskey
Hi all, It s not every 6th key, it s every time I depress multiple keys. I tested this now by pressing every key 10 times. Every time it sounded fine... until
Re: Alpha Juno 2
2011-06-17 by synthparts
Yes if it is every 6th key then there s a good chance it s a dead VCF/VCA voice chip. I have the in stock if you want one. Doug, synthparts.com
Re: Alpha Juno 2
2011-06-15 by Susie
It sounds like there s a problem with one of the voices. I m not familiar with the Alphas internals to know how voices are allocated, but in poly mode if you